Unsaid info about high compression heads

jaguar

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Joined
Nov 25, 2010
Messages
3,453
Bufu, the fact that you are doing something is not a good argument for doing it.
The scientific community can tell runners that its hard on their joints and that when they are old they will regret it. But the runners often continue with the idea that it cant be that bad because they dont feel its negative effects now.
High compression:
1) shortens the life of bearings
2) shortens the life of your cylinder plating
3) causes excessive engine heat
4) will cause detonation if the mixture isnt rich and the octane isnt high enough
5) increases engine vibration
 


Bufu racing#1

Member
Joined
Feb 23, 2016
Messages
42
Thats why you rebuild yers every 5 months Britt.
86010



Nope! No rebuilt here, 4 years! no rebuilt same piston same rings same everything!

When you know what your doing it's easy. My suggestion is to stop reading all the bogus information your see on forums and get a libery carb.
 

gary55

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Joined
Nov 27, 2012
Messages
2,938
Just out of curiosity how much time and money do you have into that 4 year engine that runs 270 psi? At the vary least It's got some real good bearings, probably a bushing and a wrist pin that is not from any china girl. With that 6cc head the squish has to be nearly non existent. Must be sleeved or nikasiled.
Whatever fuel, parts, and mods made to maintain usable tolerances for 4 years with that comp. is probably not accessible with a library card, let alone a libery carb. Sorry couldn't resist. We know you build some bad assed engines. If it's been on that frame for 4 years that's gota be close to a record without that mount breaking.
Anyways, fan of your work. That's a crazy fast bike. This is the most comp.I have done on one. Belongs to a friend of mine who don't care about getting a new engine yearly. He just want's it to run strong and rides it balls out every where he goes till it eats sh*t.
View media item 61471
View media item 61472
 
Last edited:

Bufu racing#1

Member
Joined
Feb 23, 2016
Messages
42
Bufu, the fact that you are doing something is not a good argument for doing it.
The scientific community can tell runners that its hard on their joints and that when they are old they will regret it. But the runners often continue with the idea that it cant be that bad because they dont feel its negative effects now.
High compression:
  1. shortens the life of bearings
  2. shortens the life of your cylinder plating
  3. causes excessive engine heat
  4. will cause detonation if the mixture isnt rich and the octane isnt high enough
  5. increases engine vibration
The fact that I'm doing something that works! is a very good argument for doing it.

Those are simple tasks to adress. For 1 the 6202 bearing is used on alout of different modified chain saws /scooters/ dirtbikes pushing well over 25+ hp at over 15k rpm daily for years! These 6202 Chinese! Bearing properly installed will laugh at any kind of power level you can make with These motors. Forget that your using high compression but know that your no were even near 25hp!!
 

Bufu racing#1

Member
Joined
Feb 23, 2016
Messages
42
Just out of curiosity how much time and money do you have into that 4 year engine that runs 270 psi? At the vary least It's got some real good bearings, probably a bushing and a wrist pin that is not from any china girl. With that 6cc head the squish has to be nearly non existent. Must be sleeved or nikasiled.
Whatever fuel, parts, and mods made to maintain usable tolerances for 4 years with that comp. is probably not accessible with a library card, let alone a libery carb. Sorry couldn't resist. We know you build some bad assed engines. If it's been on that frame for 4 years that's gota be close to a record without that mount breaking.
Anyways, fan of your work. That's a crazy fast bike. This is the most comp.I have done on one. Belongs to a friend of mine who don't care about getting a new engine yearly. He just want's it to run strong and rides it balls out every where he goes till it eats sh*t.
View media item 61471
View media item 61472

More time then money. In fact
Just out of curiosity how much time and money do you have into that 4 year engine that runs 270 psi? At the vary least It's got some real good bearings, probably a bushing and a wrist pin that is not from any china girl. With that 6cc head the squish has to be nearly non existent. Must be sleeved or nikasiled.
Whatever fuel, parts, and mods made to maintain usable tolerances for 4 years with that comp. is probably not accessible with a library card, let alone a libery carb. Sorry couldn't resist. We know you build some bad assed engines. If it's been on that frame for 4 years that's gota be close to a record without that mount breaking.
Anyways, fan of your work. That's a crazy fast bike. This is the most comp.I have done on one. Belongs to a friend of mine who don't care about getting a new engine yearly. He just want's it to run strong and rides it balls out every where he goes till it eats sh*t.
View media item 61471
View media item 61472

The frame was reinforced and the engine is mounted using shims. The crank shaft is a $25 mz zl crank that I reworked and Was put together in 2015 using shims and dial indicators. It's all in the install.

The most powerful tool you allready have . But one can get misguided from alout of the false information they get from the internet.

Witch is why I say to get a libery card..lol

To think that a Nasa engineer set off to make a 50cc streamliner that was over 600+ pounds to go over 150mph. I'm sure he didnt get his info from dragon fly 75 lol
 

Street Ryderz

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Joined
Oct 14, 2016
Messages
2,902
More time then money. In fact



The frame was reinforced and the engine is mounted using shims. The crank shaft is a $25 mz zl crank that I reworked and Was put together in 2015 using shims and dial indicators. It's all in the install.

The most powerful tool you allready have . But one can get misguided from alout of the false information they get from the internet.

Witch is why I say to get a libery card..lol

To think that a Nasa engineer set off to make a 50cc streamliner that was over 600+ pounds to go over 150mph. I'm sure he didnt get his info from dragon fly 75 lol
2 years ago your specs were completly different,being Zae50 47mm jog piston custom sleeved cylinder (gasoline) mikuni vm 18mm, stuffed crank.. BUFU Racing #1 ,Now it's a zl crank and sleeved,and weren't you just using a big dio not long ago? keep it real brother,you've earned the respect don't f*** it up!
 
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